5TCzBN is another sky-blue emitter from the cabzolyl benzonitrile (CBN) family that is used in TADF-OLED devices with great performance.
Acting as an encapsulation shell to the luminophore in 5TCzBN, tert-butyl units are believed to reduce the singlet–triplet splitting (ΔEST) of the compounds, which gives rise to a more efficient reverse inter-system crossing (RISC) process by effectively separating the neighbouring molecules.
General Information
| CAS number | n.a. |
|---|---|
| Full name | 2,3,4,5,6-pentakis(3,6-di-tert-butyl-9H-carbazol-9-yl)benzonitrile |
| Chemical formula | C107H120N6 |
| Molecular weight | 1490.13 g/mol |
| Absorption* | λmax 420 nm in toluene |
| Fluorescence | λem 480 nm in toluene |
| HOMO/LUMO | HOMO = 5.75 eV, LUMO = 2.74 eV, T1 = 2.60 eV [1] |
| Classification / Family | Carbazole, Phthalonitrile, TADF materials, Blue dopant materials, Sublimed materials |
* Measurable with an optical spectrometer, see our spectrometer application notes.
Product Details
| Purity | Sublimed* >99.0% (1H NMR) |
|---|---|
| Melting point | Tg = 325 °C (lit.) |
| Appearance | Yellow powder/crystals |
* Sublimation is a technique used to obtain ultra pure-grade chemicals, see sublimed materials.
Chemical Structure
Device Structure(s)
| Device structure | ITO/HATCN (5 nm)/NPB (30 nm)/TCTA (10 nm)/mCBP:5TCzBN (20 wt%) (30 nm)/DpyPA:Liq (1:1, 30 nm)/LiF (0.5 nm)/Al (150 nm) [2] |
|---|---|
| Colour | Sky-blue 
|
| Max. EQE | 21.2% |
| Max. Power Efficiency | 56.1 Im/W |
| Device structure | ITO/HATCN (5 nm)/NPB (40 nm)/TCTA (10 nm)/30 wt% 5TCzBN: DMIC-TRZ (30 nm)/B3PyMPM (40 nm)/LiF (1 nm)/Al (150 nm) [3] |
|---|---|
| Colour | Blue 
|
| Max. EQE | 19.2% |
| Max. Power Efficiency | 33.8 Im/W |
| Device structure | ITO/HATCN/NPB (30 nm)/TCTA (10 nm)/5TCzBN: mCBP (30 nm)/DPyPA:Liq (1:1, 30 nm)/Al/LiF (0.5 nm) [4] |
|---|---|
| Colour | Blue
|
| Max. EQE | 21.3% |
| Half-life Time | 12,873h @ 100cd/m2 |
*For chemical structure information, please refer to the cited references.
MSDS Documentation
5TCzBN MSDS sheetPricing
| Grade | Order Code | Quantity | Price |
|---|---|---|---|
| Sublimed (>99.0% purity) | M2220A1 | 250 mg | £420 |
| Sublimed (>99.0% purity) | M2220A1 | 500 mg | £700 |
| Sublimed (>99.0% purity) | M2220A1 | 1 g | £1150 |
Literature and Reviews
- Sterically shielded blue thermally activated delayed fluorescence emitters with improved efficiency and stability, D. Zhang et al., Mater. Horiz., 3, 145-151 (2016); doi: 10.1039/C5MH00258C.
- Highly efficient and stable blue thermally activated delayed fluorescence emitters, D. Zhang et al., SPIE (2016); DIO: 10.1117/2.1201611.006797.
- Perspective on carbazole-based organic compounds as emitters and hosts in TADF applications, B. Wex et al., J. Mater. Chem. C, 5, 8622 (2017); DOI: 10.1039/c7tc02156a.